A tube shield assembly for protecting tubes includes a guard, a securing member and a holding tooth, wherein welding is not required to secure the guard to the tube. The guard is axially elongated and can have a semi-cylindrical cross-section to define a main body portion. The securing member includes at least one pair of fastening clips to secure the guard to the tube. The fastening clips permit radial expansion and contraction of the tube and the tube shield assembly in response to, for example, temperature fluctuations. The holding tooth is a tooth-like protrusion between the tube shield assembly and the tube to which it is secured to prevent axial slippage of the tube shield assembly up or down the length of the tube.